Victorian sewer

Thanks to urban explorers and modern photographic technology, some of the most magnificent hidden engineering triumphs lying, hidden, beneath the streets of the world’s greatest cities have been recorded, in all their former glory, and posted online.

Below are some of Hydro Cleansing’s favorite snaps of sewers and drains, from London’s arched, Victorian Gothic drains, to still working ancient Roman systems and infamous giant storm drains.